A.I. wrote...
Personally I would be much more interested in an original magazine by Fakku instead of localization of the japanese ones. I mean if Fakku can´t print the magazines and has to focus on a single issue every few months then that issue has to be really special and I don´t think printing a normal japanese issue or combining best chapters will be enough, specially since those chapters will be available in the respective Volumes of the series.
I not sure what kind of content I would like to see in a Fakku magazine but surely something more than just hentai chapters. Stuff like special interviews with authors or staff, contests, news, reviews corners, all that kinda stuff. In short something unique to that magazine.
I'm guessing that's the idea for content. A good 600 page magazine can hold a good 2 dozen chapters (Averaging around 25 pages per chapter). Add a few pages for the idea mentioned by A.I. and lets not forget the exclusive artwork mention by Jacob.
Here's an idea. The exclusive art can be small posters which are signed (digitally) or maybe a postcard from a certain character (from a certain story) who is writing to the reader. For example, artwork which includes the character who is writing to you on the front. The back can be written like "Yo, what's your face. I really wish you could have stayed. Let's hangout again next season. SEE YOU SOON!".